/* ==============================================================================
 * 功能描述：RevitVisionUtil  
 * 创 建 者：Garrett
 * 创建日期：2019/6/28 9:25:34
 * ==============================================================================*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace ExportStart
{
    /// <summary>
    /// RevitVisionUtil
    /// </summary>
    public class RevitVisionUtil
    {
        /// <summary>
        /// 获取Revit文件的版本
        /// </summary>
        /// <param name="path">文件路径</param>
        /// <returns></returns>
        public static string GetRevitVision(string path)
        {
            string revitVision = null;
            FileStream stream = new FileStream(path, FileMode.Open);

            int size = 1024 * 1024;
            byte[] bytes = new byte[size];

            
            while (stream.Read(bytes, 0, size) > 0)
            {
                string str = Encoding.Unicode.GetString(bytes);
                //if (str.Contains("2014"))
                //{
                //    revitVision = "2014";

                //    File.WriteAllText(@"D:\abc.txt", str);
                //    System.Diagnostics.Process.Start("notepad.exe", path);
                //    break;
                //}

                string pattern = @"Autodesk Revit \d{4}";
                var match = Regex.Match(str, pattern);
                if (match.Success)
                {
                    revitVision = match.Value.Substring(match.Length - 4, 4);

                    //File.WriteAllText(@"D:\abc.txt", str);
                    break;
                }
            }
            return revitVision;
        }
    }
}